Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1769
-gerrit
commit 9f258a2ee987553718308cafd7c30a31a8cb8337 Author: Duncan Laurie dlaurie@chromium.org Date: Wed Oct 3 19:23:11 2012 -0700
ACPI: Zero pstate/cstate control values in FADT
If these values are non-zero then the kernel will issue an SMI for each core (cstate) and package (pstate).
Since we don't do anything with these SMI callbacks we can avoid taking the extra SMIs at boot time by zeroing these fields.
Change-Id: I3bc5fe0a9f45141d46884cb77ecdfaeaa45d2439 Signed-off-by: Duncan Laurie dlaurie@chromium.org --- src/mainboard/intel/emeraldlake2/fadt.c | 4 ++-- src/mainboard/samsung/lumpy/fadt.c | 4 ++-- src/mainboard/samsung/stumpy/fadt.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/src/mainboard/intel/emeraldlake2/fadt.c b/src/mainboard/intel/emeraldlake2/fadt.c index ff840c0..315cb58 100644 --- a/src/mainboard/intel/emeraldlake2/fadt.c +++ b/src/mainboard/intel/emeraldlake2/fadt.c @@ -47,7 +47,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->acpi_enable = APM_CNT_ACPI_ENABLE; fadt->acpi_disable = APM_CNT_ACPI_DISABLE; fadt->s4bios_req = 0x0; - fadt->pstate_cnt = APM_CNT_PST_CONTROL; + fadt->pstate_cnt = 0;
fadt->pm1a_evt_blk = pmbase; fadt->pm1b_evt_blk = 0x0; @@ -65,7 +65,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->gpe0_blk_len = 16; fadt->gpe1_blk_len = 0; fadt->gpe1_base = 0; - fadt->cst_cnt = APM_CNT_CST_CONTROL; + fadt->cst_cnt = 0; fadt->p_lvl2_lat = 1; fadt->p_lvl3_lat = 87; fadt->flush_size = 1024; diff --git a/src/mainboard/samsung/lumpy/fadt.c b/src/mainboard/samsung/lumpy/fadt.c index 6d78233..510b765 100644 --- a/src/mainboard/samsung/lumpy/fadt.c +++ b/src/mainboard/samsung/lumpy/fadt.c @@ -47,7 +47,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->acpi_enable = APM_CNT_ACPI_ENABLE; fadt->acpi_disable = APM_CNT_ACPI_DISABLE; fadt->s4bios_req = 0x0; - fadt->pstate_cnt = APM_CNT_PST_CONTROL; + fadt->pstate_cnt = 0;
fadt->pm1a_evt_blk = pmbase; fadt->pm1b_evt_blk = 0x0; @@ -65,7 +65,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->gpe0_blk_len = 16; fadt->gpe1_blk_len = 0; fadt->gpe1_base = 0; - fadt->cst_cnt = APM_CNT_CST_CONTROL; + fadt->cst_cnt = 0; fadt->p_lvl2_lat = 1; fadt->p_lvl3_lat = 87; fadt->flush_size = 1024; diff --git a/src/mainboard/samsung/stumpy/fadt.c b/src/mainboard/samsung/stumpy/fadt.c index ff840c0..315cb58 100644 --- a/src/mainboard/samsung/stumpy/fadt.c +++ b/src/mainboard/samsung/stumpy/fadt.c @@ -47,7 +47,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->acpi_enable = APM_CNT_ACPI_ENABLE; fadt->acpi_disable = APM_CNT_ACPI_DISABLE; fadt->s4bios_req = 0x0; - fadt->pstate_cnt = APM_CNT_PST_CONTROL; + fadt->pstate_cnt = 0;
fadt->pm1a_evt_blk = pmbase; fadt->pm1b_evt_blk = 0x0; @@ -65,7 +65,7 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt) fadt->gpe0_blk_len = 16; fadt->gpe1_blk_len = 0; fadt->gpe1_base = 0; - fadt->cst_cnt = APM_CNT_CST_CONTROL; + fadt->cst_cnt = 0; fadt->p_lvl2_lat = 1; fadt->p_lvl3_lat = 87; fadt->flush_size = 1024;